St Isaac’s Cathedral was designed by French architect August de Montferrand and was under construction for 40 years (1811-1851). It is one of the city‘s premier tourist attractions and the fourth tallest cupola construction in the world. The Cathedral is visible from offshore in the Gulf of Finland, but is too massive to fully grasp at close quarters.
With a height of almost 330 feet and an area more than 12,000 square feet, St Isaac’s Cathedral used to be the main Russian Orthodox Cathedral of the Russian Empire. However after the revolution of 1917 the place of worship was turned into an anti-religious museum. Even nowadays it is difficult to imagine that all the enormous decoration of the interior of the cathedral, including numerous paintings by almost 30 outstanding Russian artists and splendid mosaics created in the Russian Academy of Fine Arts which is still located in St. Petersburg, were covered with propaganda, which hid them from the visitors of the museum.